The victim is identified in a Westmont police news release as 36-year-old Cornelius L. Wilson.

At approximately 12:45 p.m., Westmont police responded to a report of shots fired at the address. The first officer was on the scene in about one minute and found Wilson unresponsive, according to the release.

Police and fire department personnel administered emergency aid and transported Wilson to Good Samaritan Hospital in Downers Grove, where he was pronounced dead a short time later.

Police said the suspect is armed and dangerous but is not believed to still be in the area of the shooting.

The suspect is described as a black male in his late 20s, 5 foot 10 to to 6 foot, with a medium build and a "lazy" eye. He is also left handed, the release said.

The suspect was wearing a green hooded jacket and a black skull cap, the release said.

At this point, the motive for the shooting and the relationship between Wilson and the suspect are unknown, according to the release.

The crime is being investigated with the assistance from major case investigators from the Felony Investigative Assistance Team, a DuPage County joint investigative task force.

The Westmont Police Department is offering a $5,000 reward for information leading to an arrest and conviction in the case, the release said.

Anyone with information should call Det. Anthony Rainaldi at 630-981-6300.